Solubilities of L-glutamic acid, 3-nitrobenzoic acid, p-toluic acid, calcium-L-lactate, calcium gluconate, magnesium-DL-aspartate, and magnesium-L-lactate in water

Solubilities of L-glutamic acid, 3-nitrobenzoic acid, p-toluic acid, calcium-L-lactate, calcium gluconate, magnesiym-DL-aspartate, and magnesium-L-lactate in water were determined in the temperature range 278 K to 343 K. The apparent molar enthalpies of solution at T = 298.15 K as derived from these solubilities are Delta(sol)H(m) (L-glutamic acid, m(sat) = 0.0565 mol . kg(-1)) = 30.2 kJ . mol(-1), Delta(sol)H(m) (3-nitrobenzoic acid, m = 0.0188 mol . kg(-1)) = 28.1 kJ . mol(-1), Delta(sol)H(m) (p-toluic acid, m = 0.00267 mol . kg(-1)) = 23.9 kJ . mol(-1), Delta(sol)H(m) (calcium-L-lactate tetrahydrate, m = 0.2902 mol . kg(-1)) = 25.8 kJ . mol(-1), Delta(sol)H(m) (calcium gluconate, m = 0.0806 mol . kg(-1)) = 22.1 kJ . mol(-1), Delta(sol)H(m) (magnesium-DL-aspartate tetrahydrate, m = 0.1469 mol . kg(-1)) = 11.5 kJ . mol(-1), and Delta(sol)H(m) (magnesium-L-lactate trihydrate, m = 0.3462 mol . kg(-1)) = 3.81 kJ . mol(-1). (C) 2002 Elsevier Science Ltd. All rights reserved.